Bạn có thể so khớp các ranh giới không phải từ bằng cách sử dụng ký tự meta “\\ B”.
Ví dụ 1
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String args[]) { //Reading String from user System.out.println("Enter a String"); Scanner sc = new Scanner(System.in); String input = sc.nextLine(); String regex = "\\B"; //Compiling the regular expression Pattern pattern = Pattern.compile(regex); //Retrieving the matcher object Matcher matcher = pattern.matcher(input); int count = 0; while(matcher.find()) { count++; } System.out.println("Number of non-word boundaries: "+count); } }
Đầu ra
Enter a String this is a sample text Number of non-word boundaries: 12
Ví dụ 2
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main( String args[] ) { String regex = "\\Bin"; Scanner sc = new Scanner(System.in); System.out.println("Enter a string: "); String input = sc.nextLine(); Pattern p = Pattern.compile(regex); Matcher m = p.matcher(input); int count = 0; while(m.find()) { count++; } System.out.println("no of non-word boundaries: "+count); } }
Đầu ra
Enter a string: this is a sample text in win tin pin sin no of non-word boundaries: 4